diff --git a/poetry.lock b/poetry.lock
index 63b75c70e..e79f395f5 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -120,17 +120,22 @@ tests = ["pytest"]
 
 [[package]]
 name = "arrow"
-version = "1.2.3"
+version = "1.3.0"
 description = "Better dates & times for Python"
 optional = true
-python-versions = ">=3.6"
+python-versions = ">=3.8"
 files = [
-    {file = "arrow-1.2.3-py3-none-any.whl", hash = "sha256:5a49ab92e3b7b71d96cd6bfcc4df14efefc9dfa96ea19045815914a6ab6b1fe2"},
-    {file = "arrow-1.2.3.tar.gz", hash = "sha256:3934b30ca1b9f292376d9db15b19446088d12ec58629bc3f0da28fd55fb633a1"},
+    {file = "arrow-1.3.0-py3-none-any.whl", hash = "sha256:c728b120ebc00eb84e01882a6f5e7927a53960aa990ce7dd2b10f39005a67f80"},
+    {file = "arrow-1.3.0.tar.gz", hash = "sha256:d4540617648cb5f895730f1ad8c82a65f2dad0166f57b75f3ca54759c4d67a85"},
 ]
 
 [package.dependencies]
 python-dateutil = ">=2.7.0"
+types-python-dateutil = ">=2.8.10"
+
+[package.extras]
+doc = ["doc8", "sphinx (>=7.0.0)", "sphinx-autobuild", "sphinx-autodoc-typehints", "sphinx_rtd_theme (>=1.3.0)"]
+test = ["dateparser (==1.*)", "pre-commit", "pytest", "pytest-cov", "pytest-mock", "pytz (==2021.1)", "simplejson (==3.*)"]
 
 [[package]]
 name = "art"
@@ -1330,13 +1335,13 @@ tests = ["asttokens (>=2.1.0)", "coverage", "coverage-enable-subprocess", "ipyth
 
 [[package]]
 name = "fastjsonschema"
-version = "2.18.0"
+version = "2.18.1"
 description = "Fastest Python implementation of JSON schema"
 optional = false
 python-versions = "*"
 files = [
-    {file = "fastjsonschema-2.18.0-py3-none-any.whl", hash = "sha256:128039912a11a807068a7c87d0da36660afbfd7202780db26c4aa7153cfdc799"},
-    {file = "fastjsonschema-2.18.0.tar.gz", hash = "sha256:e820349dd16f806e4bd1467a138dced9def4bc7d6213a34295272a6cac95b5bd"},
+    {file = "fastjsonschema-2.18.1-py3-none-any.whl", hash = "sha256:aec6a19e9f66e9810ab371cc913ad5f4e9e479b63a7072a2cd060a9369e329a8"},
+    {file = "fastjsonschema-2.18.1.tar.gz", hash = "sha256:06dc8680d937628e993fa0cd278f196d20449a1adc087640710846b324d422ea"},
 ]
 
 [package.extras]
@@ -1798,13 +1803,13 @@ requirements-deprecated-finder = ["pip-api", "pipreqs"]
 
 [[package]]
 name = "itables"
-version = "1.5.4"
+version = "1.6.0"
 description = "Interactive Tables in Jupyter"
 optional = true
 python-versions = "*"
 files = [
-    {file = "itables-1.5.4-py3-none-any.whl", hash = "sha256:ae6c36bd85688436fcf9ebb6dd6601091d0980d4845ffe13ed8d691cb11171be"},
-    {file = "itables-1.5.4.tar.gz", hash = "sha256:68b15240038dc6c7b136780f6889b61cead7325b472638226ba4b4fc34c9614c"},
+    {file = "itables-1.6.0-py3-none-any.whl", hash = "sha256:cab4e43fd3d7b2c2a4200e9896537ed85aedd1dd15fd6c6798d3fc0155bc85c8"},
+    {file = "itables-1.6.0.tar.gz", hash = "sha256:8badb079eda8caf8f16ff82caaa2ee6e8b1c3ba42e43b2e65b842fd7dc355a00"},
 ]
 
 [package.dependencies]
@@ -4176,17 +4181,17 @@ plugins = ["importlib-metadata"]
 
 [[package]]
 name = "pylint"
-version = "2.17.6"
+version = "2.17.7"
 description = "python code static checker"
 optional = false
 python-versions = ">=3.7.2"
 files = [
-    {file = "pylint-2.17.6-py3-none-any.whl", hash = "sha256:18a1412e873caf8ffb56b760ce1b5643675af23e6173a247b502406b24c716af"},
-    {file = "pylint-2.17.6.tar.gz", hash = "sha256:be928cce5c76bf9acdc65ad01447a1e0b1a7bccffc609fb7fc40f2513045bd05"},
+    {file = "pylint-2.17.7-py3-none-any.whl", hash = "sha256:27a8d4c7ddc8c2f8c18aa0050148f89ffc09838142193fdbe98f172781a3ff87"},
+    {file = "pylint-2.17.7.tar.gz", hash = "sha256:f4fcac7ae74cfe36bc8451e931d8438e4a476c20314b1101c458ad0f05191fad"},
 ]
 
 [package.dependencies]
-astroid = ">=2.15.7,<=2.17.0-dev0"
+astroid = ">=2.15.8,<=2.17.0-dev0"
 colorama = {version = ">=0.4.5", markers = "sys_platform == \"win32\""}
 dill = [
     {version = ">=0.2", markers = "python_version < \"3.11\""},
@@ -5561,6 +5566,17 @@ files = [
     {file = "types_mock-5.1.0.2-py3-none-any.whl", hash = "sha256:924ab5d5a0dbe9fd8100e073b7ed922748e7b0ad0987dc725f1a5835ce70d178"},
 ]
 
+[[package]]
+name = "types-python-dateutil"
+version = "2.8.19.14"
+description = "Typing stubs for python-dateutil"
+optional = true
+python-versions = "*"
+files = [
+    {file = "types-python-dateutil-2.8.19.14.tar.gz", hash = "sha256:1f4f10ac98bb8b16ade9dbee3518d9ace017821d94b057a425b069f834737f4b"},
+    {file = "types_python_dateutil-2.8.19.14-py3-none-any.whl", hash = "sha256:f977b8de27787639986b4e28963263fd0e5158942b3ecef91b9335c130cb1ce9"},
+]
+
 [[package]]
 name = "types-pytz"
 version = "2023.3.1.1"
diff --git a/pyproject.toml b/pyproject.toml
index f56f18c16..a9f435c09 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "SpectraFit"
-version = "0.22.9"
+version = "1.0.0"
 description = "Fast fitting of 2D- and 3D-Spectra with established routines"
 readme = "README.md"
 authors = ["Anselm Hahn <anselm.hahn@gmail.com>"]
diff --git a/spectrafit/__init__.py b/spectrafit/__init__.py
index 09b5ae529..2be9fe20d 100644
--- a/spectrafit/__init__.py
+++ b/spectrafit/__init__.py
@@ -1,2 +1,2 @@
 """SpectraFit, fast command line tool for fitting data."""
-__version__ = "0.22.9"
+__version__ = "1.0.0"